A ring network fault detection method, device, electronic equipment and storage medium

Abstract

The present invention discloses a ring network fault detection system, method, electronic device and storage medium. The ring network fault detection system is used to detect whether there is a ring network fault in a first AC system and a second AC system, and includes a host and a slave communicating with the host. When the first leakage current in the line of the first AC system is not 0, the host sends a current acquisition instruction to the slave. When the slave receives the current acquisition instruction, it sends the second leakage current collected in the line of the second AC system to the host. The host is also used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0. If so, it is determined that there is a ring network fault between the first AC system and the second AC system. There is no need to manually measure the leakage current back and forth in the two AC systems, the fault troubleshooting efficiency is high, and it is convenient to repair the ring network fault in time. In addition, the leakage currents of the two AC systems are collected at the same time, which can improve the accuracy of fault detection.

Description

Technical Field

[0001] The present invention relates to the technical field of power grid maintenance, and in particular to a ring network fault detection system, method, electronic equipment and storage medium. Background Art

[0002] AC system ring network failure refers to the incorrect connection of the feeders of two independently running AC systems, resulting in the existence of ring network current in the two AC systems. Ring network failure causes the three-phase current of the two systems to be unbalanced, which in serious cases will cause accidents such as short circuit and protection malfunction, affecting system operation.

[0003] At present, protection devices are usually used to cut off the fault current, but this is a protection method that only treats the symptoms and not the root cause. When the station personnel troubleshoot the ring network fault, they can only use current transformers to measure the leakage current back and forth in the two AC systems for troubleshooting. The troubleshooting efficiency is low. Moreover, the voltage of the AC system changes at any time, and the measured leakage current also changes, which can easily affect the maintenance personnel's judgment of the fault. Summary of the invention

[0004] The present invention provides a ring network fault detection system, method, electronic equipment and storage medium to solve the problems of low efficiency and easy misjudgment of ring network fault detection in an AC system.

[0005] In a first aspect, the present invention provides a ring network fault detection system for detecting whether there is a ring network fault in a first AC system and a second AC system, comprising a host and a slave communicating with the host;

[0006] The host is used to collect a first leakage current from the line of the first AC system, and send a current acquisition instruction to the slave when the first leakage current is not zero;

[0007] The slave is used to send the second leakage current collected in the line of the second AC system to the host when receiving the current acquisition instruction;

[0008] The host is further used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0, and if so, it is determined that a ring network fault exists between the first AC system and the second AC system.

[0009] In a second aspect, the present invention provides a ring network fault detection method, which is applied to the host as described in the first aspect, wherein the host communicates with a slave, comprising:

[0010] Collecting a first leakage current from a line of a first AC system, and sending a current acquisition instruction to the slave when the first leakage current is not zero; the slave is used to send a second leakage current collected from a line of a second AC system to the host when receiving the current acquisition instruction;

[0011] receiving the second leakage current sent by the slave device;

[0012] Determining whether a vector sum of the first leakage current and the second leakage current at the same time is 0;

[0013] If so, it is determined that a ring network fault exists between the first AC system and the second AC system.

[0014] In a third aspect, the present invention provides an electronic device, the electronic device comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to the at least one processor; wherein,

[0017] The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the ring network fault detection method described in the second aspect of the present invention.

[0018] In a fourth aspect, the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the ring network fault detection method described in the second aspect of the present invention when executed.

[0019] The ring network fault detection system of the embodiment of the present invention is used to detect whether there is a ring network fault in the first AC system and the second AC system, including a host and a slave communicating with the host, wherein the host is used to collect the first leakage current from the line of the first AC system, and send a current acquisition instruction to the slave when the first leakage current is not 0, and the slave is used to send the second leakage current collected in the line of the second AC system to the host when receiving the current acquisition instruction; the host is also used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0, and if so, it is determined that there is a ring network fault between the first AC system and the second AC system. When the first leakage current is not 0, the host can obtain the second leakage current at the same time by sending a current acquisition instruction to the slave, and when the vector sum of the first leakage current and the second leakage current is 0, it can be determined that there is a ring network fault between the first AC system and the second AC system, and there is no need to manually measure the leakage current back and forth in the two AC systems. The fault troubleshooting is efficient and fast, which is convenient for the staff to repair the ring network fault in time. In addition, the leakage currents of the two AC systems are collected at the same time, and it can accurately determine whether there is a ring network fault, thereby improving the accuracy of fault detection.

[0020] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of a ring network fault line detection provided by Embodiment 1 of the present invention;

[0023] Figure 2 is a structural block diagram of a ring network fault detection system provided by Embodiment 1 of the present invention;

[0024] Figure 3 is a schematic diagram of a sensor structure provided by Embodiment 1 of the present invention;

[0025] Figure 4 is a flow chart of a ring network fault detection method provided by Embodiment 2 of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of an electronic device provided in Embodiment 3 of the present invention. DETAILED DESCRIPTION

[0027] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0028] Embodiment 1

[0029] like Figure 1As shown, the first system includes three-phase lines A1, B1, C1 and N1, and the second system includes three-phase lines A2, B2, C2 and N2. After the point m of the feeder 1 of the first AC system and the point n of the feeder 2 of the second AC system are connected, a ring network fault occurs. Due to the voltage difference of the AC system, a voltage Umn is formed between points m and n, and a loop is formed by the neutral point grounding point of the two systems, and a ring network current is formed at the same time, that is, a leakage current. At the same time, the leakage current i1 at point a and the leakage current i2 at point b are equal in magnitude and opposite in direction, and the vector sum of the two is 0, that is, i1+i2=0.

[0030] Figure 2 This is a structural block diagram of a ring network fault detection system provided in Embodiment 1 of the present invention. This embodiment is applicable to the case where a ring network fault of two AC systems is detected. Figure 2 As shown, the ring network fault detection system includes a host 1 and a slave 2 communicating with the host 1 .

[0031] The host is used to collect a first leakage current from a line of the first AC system, and send a current acquisition instruction to the slave when the first leakage current is not zero.

[0032] When leakage current exists in the first AC system, it may be caused by a ring network fault between the first AC system and the second AC system, or it may simply be caused by moisture in the line, insulation damage, etc. At this time, the host sends a current acquisition instruction to the slave to obtain the leakage current in the second AC system. Further, it can be confirmed whether there is also a leakage current of the same magnitude and opposite direction in the second AC system.

[0033] The slave device is used to send the second leakage current collected from the line of the second AC system to the host device when receiving the current acquisition instruction.

[0034] The host and the slave can collect the leakage current of the fixed collection point on the system line in the same preset collection cycle, and the fixed collection point can be a point on the bus or feeder. Since leakage current is generated in both the first AC system and the second AC system when a ring network fault occurs, the host can only monitor the leakage current in the first AC system without simultaneously monitoring the leakage current in the first AC system and the second AC system, which can save system resources. The slave first collects and stores the second leakage current in the second AC system, and then sends the collected second leakage current to the host when receiving the current acquisition instruction sent by the host, which can reduce the amount of stored data in the host and save storage space for the host. Among them, when the slave sends the second leakage current to the host, it can send multiple second leakage currents collected in the most recent preset time period to the host. It should be noted that the communication between the host and the slave can be wireless communication or wired communication, which is not limited in this embodiment.

[0035] The host is also used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0. If so, it is determined that a ring network fault exists between the first AC system and the second AC system.

[0036] When the host receives the second leakage current, there may be multiple second leakage currents, and the second leakage current collected at the same time as the first leakage current in the determined first AC system can be screened out.

[0037] The vector sum of the first leakage current and the second leakage current is 0, that is, the first leakage current and the second leakage current have the same magnitude and opposite directions, indicating that there is a ring network fault between the first AC system 0 and the second AC system.

[0038] The ring network fault detection system of the embodiment of the present invention is used to detect whether there is a ring network fault in the first AC system and the second AC system, including a host and a slave communicating with the host, wherein the host is used to collect the first leakage current from the line of the first AC system, and send a current acquisition instruction to the slave when the first leakage current is not 0, and the slave is used to collect the second leakage current from the line of the second AC system when receiving the current acquisition instruction, and send the second leakage current to the host; the host is also used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0, and if so, it is determined that there is a ring network fault between the first AC system and the second AC system. When the first leakage current is not 0, the host can obtain the second leakage current at the same time by sending a current acquisition instruction to the slave, and when the vector sum of the first leakage current and the second leakage current is 0, it can be determined that there is a ring network fault between the first AC system and the second AC system, and there is no need to manually measure the leakage current back and forth in the two AC systems. The fault troubleshooting efficiency is high and the speed is fast, which is convenient for the staff to repair the ring network fault in time. In addition, the leakage currents of the two AC systems are collected at the same time, and it can accurately determine whether there is a ring network fault, thereby improving the accuracy of fault detection.

[0039] In an optional embodiment of the present invention, Figure 2 As shown, the host 1 includes a sensor 11, a sampling module 12 and a main control module 10 connected in sequence.

[0040] The sensor is used to sense the magnetic field of the line of the first AC system to generate current. Figure 3As shown, the sensor is an open-type current transformer, including a circular magnetic core 111, on which an openable card interface 112 is provided. After the card interface 112 is opened, the three phase lines and the N line in the first AC system can be inserted. When the line of the first AC system passes through the center of the magnetic core 111, the sensor senses the magnetic field formed by the line of the first AC system and generates a current Ict. Among them, the line includes the ABC three-phase line and the N line (not shown) of the feeder or bus, and the currents flowing in the ABC three-phase line are Ia, Ib, and Ic respectively.

[0041] The sampling module is used to collect the current generated by the sensor to obtain a first leakage current signal and send it to the main control module. Figure 3 As shown, the sampling module 12 is connected to the sensor 11. The data acquisition end of the sampling module is connected to the output end of the sensor, and the sampling module can collect the current output by the output end of the sensor, and then convert the current into an analog signal that can be recognized by the main control module, that is, convert it into a first leakage current signal. In this embodiment, the leakage current is detected, and the collected current is the leakage current signal.

[0042] The main control module is used to convert the first leakage current signal into the first leakage current. The main control module includes an A / D converter, which can be used to convert the analog signal into a digital signal, that is, convert the first leakage current signal into the first leakage current, and then determine the magnitude and direction of the measured leakage current.

[0043] It should be noted that the slave also includes the same sensors and sampling modules as the host. Since the functions and operating principles of the modules are the same, this embodiment only describes the sensors and sampling modules in the host in detail, and the sensors and sampling modules in the slave can be referred to accordingly without repeated description.

[0044] In an optional embodiment of the present invention, Figure 2 As shown, the host 1 further includes a first time synchronization module 13 connected to the master control module 10, and the slave includes a slave control module and a second time synchronization module connected to the slave control module.

[0045] The first time synchronization module and the second time synchronization module are both used to receive satellite signals and adjust the time according to the satellite signals so that the time error between the first AC system and the second AC system is less than a preset error threshold.

[0046] The satellite signal includes a time signal. The first time synchronization module and the second time synchronization module can both set the system time according to the time signal to ensure the time synchronization of the first AC system and the second AC system, and can minimize the time error collected by the two systems at the same time, and avoid the time error between the first leakage current and the second leakage current collected separately due to the time error between the systems. In addition, after the time setting is completed, the host can also obtain the instant time of the slave and compare it with the instant time of the host to confirm that the host makes the time error between the first AC system and the second AC system less than the preset error threshold. If the time error is not less than the preset error threshold, the system time is further adjusted, wherein the preset error threshold can be 1ns.

[0047] The master control module is used to send a current acquisition instruction to the slave control module when the first leakage current in the line of the first AC system is not 0, and the current acquisition instruction includes an acquisition time. The slave control module is used to send the second leakage current collected at the acquisition time to the master control module when receiving the current acquisition instruction.

[0048] The slave has collected a lot of second leakage current data in advance, and when receiving the current acquisition instruction sent by the main control module, if all the collected second leakage current data are sent to the main control module, there are disadvantages of slow transmission speed and high resource occupation. When the main control module determines that the first leakage current in the first AC system is not 0, it only needs to obtain the second leakage current at the same time as the first leakage current from the slave control module of the slave. Therefore, the main control module can add the acquisition time of the first leakage current to the current acquisition instruction, and the slave control module can filter out the second leakage current at the same time as the first leakage current according to the acquisition time. On the basis of obtaining the required second leakage current, it not only saves the host's computing power resources and storage resources, but also avoids the slow transmission speed caused by large amounts of data transmission.

[0049] In an optional embodiment of the present invention, the slave is further configured to send the second collection point corresponding to the second leakage current to the host when receiving the current acquisition instruction.

[0050] The host comprises a collection point recording module, a collection point updating module, a fourth current collection instruction sending module, a current data acquisition module and a fault point confirmation module.

[0051] The collection point recording module is used to receive the second collection point sent by the slave when confirming that there is a ring network fault, and record the first collection point in the first AC system and the second collection point in the second AC system.

[0052] The collection point update module is used to use the line between the feeder end and the first collection point in the first AC system and the preset distance from the first collection point as the first line segment, and use the line between the feeder end and the second collection point in the second AC system and the preset distance from the second collection point as the second line segment. Figure 1 As shown, the feeder end is the end where feeder 1 and feeder 2 are located. Assume that the first acquisition point is point a and the second acquisition point is point b. In the first AC system, the line between the feeder end and the first acquisition point a and the preset distance from the first acquisition point a is the line between points ac, i.e., the first line segment. In the second AC system, the line between the feeder end and the second acquisition point b and the preset distance from the second acquisition point b is the line between points bd, i.e., the second line segment. When the fault points are m and n respectively, leakage current can be detected in both am and bn segments, then leakage current can also be detected at points c and d, and ic+id=0.

[0053] The fourth current acquisition instruction sending module is used to generate a fourth current acquisition instruction according to the position information of the second line segment and send it to the slave, so as to control the slave to acquire multiple fourth currents in the second line segment.

[0054] The current data acquisition module is used to acquire a plurality of third leakage currents collected from the first line segment at a preset step length starting from the first acquisition point in the first AC system, and to receive a fourth leakage current sent by the slave. Since the location of the fault point where the ring network fault occurs is uncertain, a plurality of third leakage currents can be collected from the first line at a preset step length. Similarly, when the slave collects the fourth current, it also collects a plurality of fourth leakage currents from the second line segment at a preset step length starting from the second acquisition point.

[0055] The fault point confirmation module is used to determine the location of the fault point where the ring network fault occurs in the first AC system and the second AC system according to the third leakage current and the fourth leakage current.

[0056] Specifically, the fault point confirmation module includes a leakage current extraction unit and a fault point determination unit.

[0057] The leakage current extraction unit is used to extract the third leakage current that is not zero and measured last time from multiple third leakage currents as the target third leakage current, and to extract the fourth leakage current that is not zero and measured last time from multiple fourth leakage currents as the target fourth leakage current.

[0058] The fault point determination unit is used to determine that the fault point in the first AC system is between the power supply end and the collection point corresponding to the target third leakage current, and to determine that the fault point in the second AC system is between the power supply end and the collection point corresponding to the target fourth leakage current.

[0059] On the basis of the above-mentioned determination of the line segment where the fault point is located, the range of the fault point can be further narrowed down, such as Figure 1 As shown in the figure, the leakage current can also be measured at points e and f, which are closer to the feeder end. Obviously, there is no leakage current at points e and f, which means that the fault point is between the ce line segments and the df line segments. By gradually narrowing the measurement range, the location of the fault point can be accurately measured.

[0060] In an optional embodiment of the present invention, Figure 2 As shown, the host 1 also includes a display module 14 connected to the main control module 10 .

[0061] The main control module is also used to send the first leakage current, the second leakage current and the acquisition time to the display module, and the display module is used to display the first leakage current, the second leakage current and the acquisition time. The display module is mainly used for human-computer interaction to facilitate staff to view the detection data.

[0062] In an optional embodiment of the present invention, Figure 2 As shown, the host 1 also includes an alarm module 15 connected to the main control module 10 .

[0063] The main control module is also used to send an alarm instruction to the alarm module when it is determined that there is a ring network fault, and the alarm module is used to issue an alarm when receiving the alarm instruction. For example, the alarm module can be a beeper, a warning light, etc.

[0064] Embodiment 2

[0065] Figure 4 A flow chart of a ring network fault detection method provided in Embodiment 2 of the present invention. The embodiment of the present invention can be applied to detect ring network faults in a first AC system and a second AC system, and can be applied to the host as described in Embodiment 1, the host is connected to the first AC system, the slave is connected to the second AC system, and the host communicates with the slave, such as Figure 4 As shown, the ring network fault detection method includes:

[0066] S401: Collect a first leakage current from a line of a first AC system, and send a current acquisition instruction to a slave device when the first leakage current is not zero.

[0067] The slave is used to send the second leakage current collected in the line of the second AC system to the host upon receiving the current acquisition instruction;

[0068] S402, receiving a second leakage current sent by the slave device;

[0069] S403, determining whether the vector sum of the first leakage current and the second leakage current at the same time is 0, if so, executing S404, if not, returning to executing S401.

[0070] S404: Determine whether a ring network fault exists between the first AC system and the second AC system.

[0071] In an optional embodiment of the present invention, collecting the first leakage current from the line of the first AC system includes:

[0072] generating a current by inducing a magnetic field of a line of the first AC system through a sensor, wherein the sensor is an open-type current transformer;

[0073] collecting the current generated by the sensor to obtain a first leakage current signal;

[0074] The first leakage current signal is converted into the first leakage current.

[0075] In an optional embodiment of the present invention, before collecting the first leakage current from the line of the first AC system, the method further includes:

[0076] A satellite signal is received and the time is adjusted according to the satellite signal.

[0077] The sending of a current acquisition instruction to the slave device when the first leakage current is not zero includes:

[0078] When the first leakage current in the line of the first AC system is not zero, a current acquisition instruction is sent to the slave control module, and the current acquisition instruction includes a collection time; the slave control module is also used to send the second leakage current collected at the collection time to the master control module when receiving the current acquisition instruction.

[0079] In an optional embodiment of the present invention, the slave is further configured to send a second collection point corresponding to the second leakage current to the host when receiving the current acquisition instruction, and the ring network fault detection method further includes:

[0080] When it is confirmed that there is a ring network fault, recording a first collection point in the first AC system and a second collection point in the second AC system;

[0081] A line between a feeder end and a first collection point in the first AC system and a preset distance from the first collection point is used as a first line segment, and a line between a feeder end and a second collection point in the second AC system and a preset distance from the second collection point is used as a second line segment;

[0082] Generate a fourth current acquisition instruction according to the position information of the second line segment and send it to the slave, so as to control the slave to acquire a plurality of fourth currents in the second line segment;

[0083] Acquire a plurality of third leakage currents collected from the first line segment starting from the first collection point with a preset step length, and receive the fourth leakage current sent by the slave;

[0084] The locations of fault points where ring network faults occur in the first AC system and the second AC system are determined according to the third leakage current and the fourth leakage current.

[0085] In an optional embodiment of the present invention, determining the location of the fault point where the ring network fault occurs in the first AC system and the second AC system according to the third leakage current and the fourth leakage current includes:

[0086] Extracting the third leakage current that is not zero and is measured last time from the plurality of third leakage currents as the target third leakage current, and extracting the fourth leakage current that is not zero and is measured last time from the plurality of fourth leakage currents as the target fourth leakage current;

[0087] It is determined that the fault point in the first AC system is between the feeder end and the collection point corresponding to the target third leakage current, and it is determined that the fault point in the second AC system is between the feeder end and the collection point corresponding to the target fourth leakage current.

[0088] In an optional embodiment of the present invention, the ring network fault detection method further includes:

[0089] The first leakage current, the second leakage current and the acquisition time are sent to the display module; the display module is used to display the first leakage current, the second leakage current and the acquisition time.

[0090] In an optional embodiment of the present invention, the ring network fault detection method further includes:

[0091] When it is determined that there is a ring network fault, an alarm instruction is sent to the alarm module, and the alarm module is used to issue an alarm when receiving the alarm instruction.

[0092] The ring network fault detection method of this embodiment can be applied to the ring network fault detection system provided in the first embodiment, so that the ring network fault detection system has corresponding beneficial effects. It should be noted that for the method embodiment, since it is basically similar to the system embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the system embodiment.

[0093] Embodiment 3

[0094] Figure 5A schematic diagram of the structure of an electronic device 40 that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0095] like Figure 5 As shown, the electronic device 40 includes at least one processor 41, and a memory connected to the at least one processor 41, such as a read-only memory (ROM) 42, a random access memory (RAM) 43, etc., wherein the memory stores a computer program that can be executed by at least one processor, and the processor 41 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 42 or the computer program loaded from the storage unit 48 to the random access memory (RAM) 43. In the RAM 43, various programs and data required for the operation of the electronic device 40 can also be stored. The processor 41, the ROM 42, and the RAM 43 are connected to each other through a bus 44. An input / output (I / O) interface 45 is also connected to the bus 44.

[0096] A number of components in the electronic device 40 are connected to the I / O interface 45, including: an input unit 46, such as a keyboard, a mouse, etc.; an output unit 47, such as various types of displays, speakers, etc.; a storage unit 48, such as a disk, an optical disk, etc.; and a communication unit 49, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 49 allows the electronic device 40 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0097] The processor 41 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the processor 41 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The processor 41 executes the various methods and processes described above, such as a ring network fault detection method.

[0098] In some embodiments, the ring network fault detection method may be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as a storage unit 48. In some embodiments, part or all of the computer program may be loaded and / or installed on the electronic device 40 via the ROM 42 and / or the communication unit 49. When the computer program is loaded into the RAM 43 and executed by the processor 41, one or more steps of the ring network fault detection method described above may be performed. Alternatively, in other embodiments, the processor 41 may be configured to perform the ring network fault detection method in any other appropriate manner (e.g., by means of firmware).

[0099] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations can include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0100] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that when the computer program is executed by the processor, the functions / operations specified in the flow chart and / or block diagram are implemented. The computer program may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0101] In the context of the present invention, a computer-readable storage medium may be a tangible medium that may contain or store a computer program for use by or in combination with an instruction execution system, device or equipment. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. A more specific example of a machine-readable storage medium may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0102] To provide interaction with a user, the systems and techniques described herein may be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0103] The systems and techniques described herein may be implemented in a computing system that includes backend components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes frontend components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such backend components, middleware components, or frontend components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0104] A computing system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The client and server relationship is generated by computer programs running on the corresponding computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or cloud host, which is a host product in the cloud computing service system to solve the defects of difficult management and weak business scalability in traditional physical hosts and VPS services.

[0105] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0106] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A ring network fault detection system, characterized in that: Used to detect whether there is a ring network fault in the first AC system and the second AC system, including a host and a slave communicating with the host; The host is used to collect a first leakage current from the line of the first AC system, and send a current acquisition instruction to the slave when the first leakage current is not zero; The slave is used to send the second leakage current collected in the line of the second AC system to the host when receiving the current acquisition instruction; The host is further used to determine whether the vector sum of the first leakage current and the second leakage current at the same time is 0, and if so, determine that there is a ring network fault between the first AC system and the second AC system; The host includes a sensor, a sampling module and a main control module connected in sequence. The sensor is an open-type current transformer, which is used to sense the magnetic field of the line of the first AC system to generate current; The sampling module is used to collect the current generated by the sensor to obtain a first leakage current signal and send it to the main control module; The main control module is used to convert the first leakage current signal into the first leakage current; The host further comprises a main control module and a first time synchronization module connected to the main control module, and the slave comprises a slave control module and a second time synchronization module connected to the slave control module. The first time synchronization module and the second time synchronization module are both used to receive satellite signals and adjust the time according to the satellite signals; The master control module is configured to send a current acquisition instruction to the slave control module when a first leakage current in the line of the first AC system is not zero, wherein the current acquisition instruction includes an acquisition time; The slave control module is configured to send the second leakage current collected at the collection time to the master control module upon receiving the current acquisition instruction; The slave is further configured to send the second collection point corresponding to the second leakage current to the host upon receiving the current acquisition instruction; The host comprises: A collection point recording module, used for recording a first collection point in the first AC system and a second collection point in the second AC system when a ring network fault is confirmed; a collection point updating module, configured to use a line between a feeder end and a first collection point in the first AC system and a preset distance from the first collection point as a first line segment, and use a line between a feeder end and a second collection point in the second AC system and a preset distance from the second collection point as a second line segment; a fourth current acquisition instruction sending module, configured to generate a fourth current acquisition instruction according to the position information of the second line segment and send the instruction to the slave device, so as to control the slave device to acquire a plurality of fourth leakage currents in the second line segment; a current data acquisition module, configured to acquire a plurality of third leakage currents collected from the first line segment starting from the first collection point with a preset step length, and receive the fourth leakage current sent by the slave; A fault point confirmation module is used to determine the location of the fault point where the ring network fault occurs in the first AC system and the second AC system according to the third leakage current and the fourth leakage current.

2. The ring network fault detection system according to claim 1, characterized in that: The fault point confirmation module includes: a leakage current extraction unit, configured to extract the third leakage current that is not zero and is measured last time from the plurality of third leakage currents as a target third leakage current, and to extract the fourth leakage current that is not zero and is measured last time from the plurality of fourth leakage currents as a target fourth leakage current; A fault point determination unit is used to determine that the fault point in the first AC system is between the feeder end and the collection point corresponding to the target third leakage current, and to determine that the fault point in the second AC system is between the feeder end and the collection point corresponding to the target fourth leakage current.

3. The ring network fault detection system according to any one of claims 1 to 2, characterized in that: The host also includes a main control module and a display module connected to the main control module. The main control module is further used to send the first leakage current, the second leakage current and the acquisition time to the display module; The display module is used to display the first leakage current, the second leakage current and the acquisition time.

4. The ring network fault detection system according to any one of claims 1 to 2, characterized in that: The host also includes a main control module and an alarm module connected to the main control module. The main control module is further used to send an alarm instruction to the alarm module when it is determined that there is a ring network fault; The alarm module is used to issue an alarm when receiving the alarm instruction.

5. A ring network fault detection method, characterized in that: Applied to a host according to any one of claims 1 to 4, the host communicating with a slave, comprising: Collecting a first leakage current from a line of a first AC system, and sending a current acquisition instruction to the slave when the first leakage current is not zero; the slave is used to send a second leakage current collected from a line of a second AC system to the host when receiving the current acquisition instruction; receiving the second leakage current sent by the slave device; Determining whether a vector sum of the first leakage current and the second leakage current at the same time is 0; If so, it is determined that a ring network fault exists between the first AC system and the second AC system.

6. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the ring network fault detection method according to claim 5.

7. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the ring network fault detection method according to claim 5 when executed.

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